/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.skatiger.jrove.servlet;

import java.util.Enumeration;
import java.util.Map;

import javax.servlet.ServletContext;


public final class InitParameterMap extends AbstractAttributeMap<String> {
    private final ServletContext _servletContext;

    InitParameterMap(final ServletContext servletContext) {
        _servletContext = servletContext;
    }

    public void clear() {
        throw new UnsupportedOperationException();
    }

    protected String getAttribute(final String key) {
        return _servletContext.getInitParameter(key);
    }

    @SuppressWarnings("unchecked")
    protected Enumeration<String> getAttributeNames() {
        return _servletContext.getInitParameterNames();
    }

    public void putAll(final Map<? extends String, ? extends String> t) {
        throw new UnsupportedOperationException();
    }

    protected void removeAttribute(final String key) {
        throw new UnsupportedOperationException("Cannot remove ServletContext InitParameter");
    }

    protected void setAttribute(final String key, final String value) {
        throw new UnsupportedOperationException("Cannot set ServletContext InitParameter");
    }
}
